[PATCH v2 1/4] mmc: omap_hsmmc: Convert hsmmc driver to use device tree

[T Krishnamoorthy, Balaji]

On Thu, Feb 23, 2012 at 5:31 PM, Rajendra Nayak <rnayak at ti.com> wrote:
> Define dt bindings for the ti-omap-hsmmc, and adapt
> the driver to extract data (which was earlier passed as
> platform_data) from device tree.
>
> Signed-off-by: Rajendra Nayak <rnayak at ti.com>
> ---
>  .../devicetree/bindings/mmc/ti-omap-hsmmc.txt      |   31 +++++++++
>  drivers/mmc/host/omap_hsmmc.c                      |   68 ++++++++++++++++++++
>  2 files changed, 99 insertions(+), 0 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
>
> diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
> new file mode 100644
> index 0000000..e4fa8f0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
> @@ -0,0 +1,31 @@
> +* TI Highspeed MMC host controller for OMAP
> +
> +The Highspeed MMC Host Controller on TI OMAP family
> +provides an interface for MMC, SD, and SDIO types of memory cards.
> +
> +Required properties:
> +- compatible:
> + Should be "ti,omap2-hsmmc", for OMAP2/3 controllers

omap_hsmmc is applicable for omap2430 and omap3.
omap2420 has non high speed controller mmci-omap - drivers/mmc/host/omap.c
May be omap3-hsmmc compatible with omap2430 ?

> + Should be "ti,omap4-hsmmc", for OMAP4 controllers
> +- ti,hwmods: Must be "mmc<n>", n is controller instance starting 1
> +- reg : should contain hsmmc registers location and length
> +
> +Optional properties:
> +ti,dual-volt: boolean, supports dual voltage cards
> +<supply-name>-supply: phandle to the regulator device tree node
> +"supply-name" examples are "vmmc", "vmmc_aux" etc
> +ti,bus-width: Number of data lines, default assumed is 1 if the property is missing.
> +cd-gpios: GPIOs for card detection
> +wp-gpios: GPIOs for write protection
> +ti,non-removable: non-removable slot (like eMMC)
> +
> +Example:
> +       mmc1: mmc at 0x4809c000 {
> +               compatible = "ti,omap4-hsmmc";
> +               reg = <0x4809c000 0x400>;
> +               ti,hwmods = "mmc1";
> +               ti,dual-volt;
> +               ti,bus-width = <4>;
> +               vmmc-supply = <&vmmc>; /* phandle to regulator node */
> +               ti,non-removable;
> +       };